Expanding a tubular element in a wellbore
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United States of America Patent
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May 20, 2014
Grant Date -
Oct 27, 2011
app pub date -
Dec 22, 2009
filing date -
Dec 24, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A method is provided of radially expanding a tubular element (56) in a well-bore using an expander located in the tubular element, the expander (40) comprising an expansion member (48) and a plurality of segments (50) spaced in circumferential direction around the expansion member, the segments being movable between a radially retracted position and a radially expanded position by axial movement of the expansion member relative to the segments. The method includes a plurality of successive expansion cycles, wherein each expansion cycle comprises the steps of: (a) moving the expander (40) in axially forward direction through the tubular element (56) whereby the segments (56) are in the radially retracted position; and (b) radially expanding the tubular element by moving the segments to the radially expanded position by axially moving the expansion member relative to the segments.
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